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xmpfilter is a small tool that can be used to

• generate Test::Unit assertions and RSpec expectations semi-automatically
• annotate source code with intermediate results (a bit like irb --simple-prompt but only for the lines explicitly marked with # =>). Very useful for example code (such as postings to ruby-talk).

As of 0.3.1, xmpfilter can generate RSpec expectations in addition to Test::Unit assertions, as shown in this animation:

xmpfilter can be used conveniently from any decent editor (see README.vim and README.emacs for examples). xmpfilter 0.3.1 works on win32 and solves a couple minor bugs in 0.3.0.

Download

Get xmpfilter here.